Telephone system.



PATENTED MAY 22, 1906.

J. H. GORDEN. TELEPHONE SYSTEM.

APPLIOATION FILED JUNE 10, 1903.

4 SHEETS-SHEET 1.

Witnesses Httomegs PATENTED MAY 22, 1906.

J. H. GORDEN. TELEPHONE SYSTEM. APPLICATION FILED JUNE 10,1903.

4 SHEETS-SHEET 2.

mimi

Rttonegs Wxtnesses PATENTED MAY 22, 1906.

J. H. GOEDEN.

TELEPHONE SYSTEM.

APPLIOATION FILED JUNE10,1903.

4 SHEETE-SHEET 3.

25' liH- L] a Garden, Inventor,

r I Attornegs Witnesses PATENTED MAY 22, 1906.

J. H. GORDEN. TELEPHONE SYSTEM. APPLICATION FILED JUNE 10, 1903.

4 EsHEETS-SHEET 4.

GwxZeiu Inventor.

r I Httomegs Witnesses 2 30 size, and minor details of the structure may.

JAMES PATTESON, OF COOPER,

TELEPHONE SYSTEM.

No. 921,482. Specification of Letters Patent. Patented May 22, 1906. Application filed June 10.1903. Serial to. 150.939.

To all whom ifi'may concern.-

Be it known thatl, JAMES H. GoRnnN, acitizen of the United States, residing at Cooper, in the county of' Delta and State of tion is such that all of the telephones along to ro ol' lockout systems wherein I'OVISIOD. is made for locking. the receiver-hoo s at all substa; tions between two connected stations, thus preventing overhearin of a conversation. further object oft e invention is to pro r5 vid a system in which the line may be subdivided to permitits use for more than one message at the same time-that is to say, any two connected subscribers will monopolize only that portion of the zo'stations, while the line beyond each of the ic return, as the case may be.

'Each of the local stationsis provided with a receiver 6, an induction-coil 7, a magneto- 7o generator 8, a call-bell 9, and a transmitter 10, all of which may be of the usual construction.

At each local station is a receiver-hook-11, which may be of the usual construction and provided with a suitable spring for raising 5 the outer end of the hook when the receiver is removed. In the-switc .-box of each tele phone, preferably at a point belowv the receiver-hook, are arranged a numberofcontacts 12, 13, 14, 15, and 16 and an additional 80 contact 11, that may be said to form a part of the receiver-hook, this contact ,being connected to said receiver-hook by a link 50.

en the receiver is on the hook and the arts are in thenormal positio (shown in 85. Fig. 2,) the receiver-hook contact 11' and the contacts 12, 13, and 14 are all electrically connected, while the contacts 15 and 16 are spaced from eachotherand from the receivere between their two two connected subscribers 1s still open for use.

2 5 tion and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and particularly-pointed out in the appended claims, it being understood that various changes in they orm, proportions,

be made without de arting from the spirit or sacrificing any of th e advantages of themvention. I 1. In the-accompanying drawings, Figure 1 is 5 a diagram illustrating a number of stations Fig. 2'is a similar View, on an enlarged scale, ofone0f the stations, showing the positions which the parts occup when not in use. Fig. 0 3 is aview similar to 2, showing the position to which the receiver-hook is moved when the subscriber Wishes to talk to astation to the right. Fig. 4 is a similar view illustratin the position assumed by the re- 5 ceiver-hoolc when'the subscriber wishes to talk to a station on the left. Fig. .5 is a de-' tail .view of the receiver-hook-locking mechanism.

Similar numerals of reference are employed 50 to indicate correspondin parts throughout theseveral figures of the awings. Eachsubstationhas'a telephone provided with'three binding-posts 1, 2, and 3, of which the landing-posts land 3 are connected to a tion, it will be seen on reference to Fig.' 2 that the circuit through the telephone is com- .pleted and the connection between two stations-one to the'ri ht and one to the left of the station shownin%ig. 2*is in series. This 5 talkin circuit may be traced through a wire r? electromagnet 23 to contact 14, contact 12, and wire 17 to binding-post 3, and the main line, showing that the circuit through tion the electromagnet 23 will be energized and will remain energized so long as any two subscribers on opposite'sides of said station are talking, the primar batteries of the connected stations,jas wi appear hereinafter, 1o 5 being connected in series with the line and being of, sufficientstrenfith to energize the electromagnets. Ineac local EtitfilOIl is a hook contact. This being the normal posi-' o the station is completed and that at this sta- Ioo magnets at intermediate stations will be enreceiver-hook-locking catch 27, which may 1 be formed of soft iron and is disposed within the field of force of the electromagnet 23. 1 When the electromagnet is energized, this catch is moved from the receiver-hook and i prevents raising of the latter and the overhearing of any conversation by a subscriber between two cjonnected stations. At a point adjacent to the electromagnet is arranged a 1 second catch 28, that is operable by a projecting knob extending outside the switchboX. This catch 28 normally lies in the path of movement otrthe receiver-hook switch and limits upward movement of the latter under ordinary conditions that is to say, if the re- 5 ceiver is removed from the hook the latter i will be elevated until it strikes the lower end of the catch 28, as shown in Fig. 3. Under certain conditions, however, it may be desired to allow further upward movement of the receiver-hook, and this is accomplished by moving the catch 28 outward, so that'said hook can raise to the position shown in Fig. 4. The catch 28 is under the control of the subscriber; but the catch 27 is not, and during the time a conversation is being carried on between two subscribers all of the electroergized and the catches 27 attracted tore-- ceiver-hooklocking positions.

The receiver hook controls two pole changers 30 and 31, each of'which consists of two spring-contact plates adapted to be moved into engagement with each other by the receiver-hooks When the receiver-hook moves up to the first position, (indicated in Fig. 3,) the two contacts of the pole-changer 30 .will be engaged, while the contacts 31 will remain open. When moved up to the highest position, (shown in Fig. 4,) the two contacts 31 will be engaged and the contacts 30 will be open. This gives two directions from battery to ground. The ground-wire 33 is connected to binding-post 2, and from binding-post 2 leads a wire 34 to the primary of the induction-coil 7. From the inductioncoil lead two wires 35 and 36, one to the polechanger 30 and the other to the pole-changer 31. From the pole-changer 30 leads a wire 31 through the transmitter 10 to one side of the battery 26 and from the opposite side of the battery leads a wire '35 'to' the polechanger 31. The wire 35 is connected by a wire 37 to contact 13 and the wire 31 is connected by a wire 38 to contact 16. Leading from the wire 34 is a wire 40, that is connected to the bell, condenser 19, magneto-generator 8, and wire '41 to the receiver-hook contact 11. From the wire 22 at a pointadjacent to the binding-post 1 leads a wire 43 to contact 15, and from the binding-post 3 leads a wire 17 to the contact 12. 1t will-be observed that the receiver 6 is connected in a strictly local circuit with the secondary of the induction-coil by a wire 45.

tor, and the signaling-circuit is established from the ground-wire wire 34, wire 40, call-bell 9, condenser 19', magnetogenerator 8, coil 41, contact 11, contacts 13 and 12, and wire 17 out through the main line 4 to the right. To each of the stations on the right the circuit is continued through binding-post 1, wire 22, electromagnet 23, contact 14, contacts 12 1-3 11, to. wire 41, magneto-generator 8, wire 40, condenser 19, call-bell 9, wire 40, wire 34, bindingpost 2 to ground-wire 33 allot the stations to the right being thus bridged between the main line and the ground. The series circuit is still established through wire 22, electromagnet 23 contact 14, contact 12, wire 17, and binding-post 3.

The called subscriber having ascertained by test that the call is from the left, manipulates the catch 28 and allows the receiverhook to move upward to the position shown in Fig. 4, thus closing the contacts ofthe polechanger 31 and connecting contacts 11, 16, and 15, while opening contacts 12, 13, and 14.

The stations shown in Figs. 3 and 4 being now connected, with the station shown in Fig. 2 between them, the talking-circuit may be traced from the ground at station shown in Fig. 3 to wire 33, binding-post 2, wire 34, the primary of the induction-coil 7, wire 35, contacts of the pole-changer 30, wire 31, V transmitter 10, primary battery 26, wire 25, wire 37, contact 13, contact 12, wire 17 binding-post 3 to line-wire. The circuit is eXtend ed at the station shown inFi 2 from linewire through binding-post 1, wire 22, electro-- magnet 23, wire 22, contacts 14 and 12, wire 17 binding-post '3 to main-line wire 4, so that .at the station the electromagnet 23 is energized, and the receiver cannot be raised to allow overhearing of the conversation. At the station shown in Fig. 4 the circuit extends from the left over main line 4, binding-post 1 wire 22,wire 43, contact 15, contact 16,wire 38, transmitter 10, battery 26, wire 25, polechanger 31, wire 36, the primary of the induction-coil 7, wire 34, binding post 2, and ground-wire 33. From this it will be seen that the batteries 26 are connected in series, and these batteries are of sufiicient strength to energize all of the electromagnets 23 at the intermediate stations.

Returning now-to station it will be observed that the line to the le shown in Fi 3, t of 33, binding-post 2,

station and cannot overhear any conversaelectromagnet 23, thence by wire 22 to contact 14, which is open. rom wire 22 runs wire 43 to contact. 15, which is also open.

At station N o. 4 the line to the right is entirel y cut out from station 4. From bindingpost 3 runs wire 17 to contact 12, which is open, so that no current can pass to or from the right of station 4.

en any subscriber wishes to call any subscriber to his left, the receiver is removed from the hook and catch 28 is moved to release position, as shown in Fig. 4, thus ermitting the receiver-hook to raise. to the highest point. A signaling-circuit is now established from ground-wire 33, binding-post 2, wire 34, wire 40, call-bell 9, condenser 19,

magneto-generator 8, w re 4 1, contact 11 condenser 19, w1re40, call-bell 9, wire 40, wire 34, blIIdIIIg POSi) 2 to ground-wire 33.

that portion of the line between them, while and 4 may monopolize any portion of the line at the same time.

It is further evident that every subscriber 3 at his station is denergized.

Having thus described the invention, what is claimed is 1. In party-line telephone systems, a receiver-hook-locking magnet at each substa-' t receiver-hook.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in he presence of two witnesses.

tion, all of said magnets being connected in series with a line-wire without including any of the local telephone or signaling apparadiscoi'moctod by the receiver-hook-locking magnet when the line is energized, a receiver- Witnesses hook, a plurality of connections under the control of the re'ceiver-hookand means for limiting movement of the receiver-hook to 60. close signalin line-wire on either side of the station to the common return, and to cut out the line-Wire connection on the opposite side. i

and talking circuits from the r In a party-line telephone system, a line- 6 d means serving to limit wire on the opposite side, and on extended magnet in series with t e line-wire, and a manually-operable catch for permitting ex- 86 tended movement of the receiver-hook. In party-line systems, a plurality of substations, a line-wire extending from st'ation to station, and seriallyconnected thereto,

being at king magnet, a plurality of contactsunder the control of the receiverhook, and teleph t e receiver-hook-locldng magnet being nor- 9o 01110 and signaling devices,

mally connected in series with the-main line,

andthe tele hom'c apparatus being normally 'sconnecte I from t beingheld disconnected while the electromagnet is ener ized, limited movement of the re- 5 ceiver-hooi e common return and for locki the re- JAMES 'H. GORDEN,

J. L. FRAIZER, W. F. ROUNTREE. 

